PassLock Security Light On? (Perfect answer)

if you find yourself stranded, your engine won’t start, and the security light is flashing, wait ten minutes. the flashing light should go off or illuminate without flashing. when it does, turn the ignition off, wait twenty seconds, and then try to start the engine.

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Insert the master key with the black head into the ignition lock cylinder 2. Turn the key to ON but do not start the engine. The SECURITY light will turn on and stay on.

What would cause the security light to come on?

Hello. On your particular vehicle the security light staying on as the vehicle is running is an indication that the security system has failed and is disabled. It is common for a security light to come on after battery dies because the computer may lose its programming to the key.

Why does my anti-theft light stay on?

That could be due to your remote having a dead battery or the car’s battery being dead and losing its key memory. It also could be that you have a damaged immobilizer chip in your key or a damaged car door lock.

How do I reset my PASSLock?

Thankfully this is an easy fix.

Leave the ignition key turned to the “On” position after the vehicle has stalled and will not start.
Look at the dashboard and locate the theft system light.
Turn the ignition to the “Off” position to disable the PassLock system, and wait for 20 seconds for the system to reset.

How do I fix PASSLock on GM?

How to Fix Passlock for Chevy Vehicles. A temporary fix is to leave your key in the ignition, at the “auxiliary” position for about 10-15 minutes until the security light shuts off. When the light shuts off you can try to start the engine again. Rinse, repeat, and cry.

Why is my outdoor security light flashing?

Flickering motion sensor lights can be caused by several things: A bad bulb or diode. A pretty straight-forward problem, even high-quality lights tend to go out eventually and sometimes even new ones can malfunction. A bad connection between the bulb or diode and the light fixture itself.

How do I know if my PASSLock is activated?

Most PASSLock-equipped vehicles have a telltale indicator in the instrument panel. When a PASSLock-equipped vehicle is being started, the instrument panel warning light for PASSLock remains on until the engine starts.

Can you disable passlock?

The Passlock system on a Vehicles is the anti-theft system. The Passlock system uses a recognition transponder in the ignition tumbler and a computer chip in the ignition key. While you cannot remove the Passlock system, you can disable it by tricking it into thinking the Vehicles had a malfunction.

Will disconnecting battery reset anti theft?

It is another way to solve the problem of anti theft system car wont start. Disconnect the positive terminal of the battery for a minute or two. It will reset the computer system and your car is likely to kick off.

Does anti theft light drain battery?

Most modern cars that include a factory installed theft deterrent system use a low power LED that draws between 5 and 10 mAmps. This would take a very long time to drain a good battery. Most GM cars can sit in an airport parking lot at least a month and still start. Eventually it will drain the battery.

How long does it take for PassLock to reset?

This will take approximately 10 to 15 minutes. Start the car immediately once the “Theft Sys” light stays on steadily. Remember to not turn the key off. Your car will now reset the passlock system and start as usual.

Does passlock disable fuel pump?

Yes, the fuel pump should still run even if there is a passlock issue.

How do I turn off anti theft system?

To turn off the anti-theft system, use your remote to press the unlock button key. It is advised to use the key to unlock the door and turn on the ignition switch. If that does not work, try to lock the door on the driver’s side using the key while you are out of the car.

Where is the PassLock module located?

There is only one PassLock system. There is no sensor in the ignition lock cylinder, the Passlock sensor is in the ignition lock cylinder housing, and there is a magnet in the ignition lock cylinder.

How does the GM PassLock system work?

The PassLock system works when the lock cylinder moves a magnet past a Hall effect sensor. The sensor then sends a signal to the control, which GM has moved several times over the model years. The control then sends the code to the PCM. If the code is correct, the PCM will allow the car to start and run.

Can’t Start My Car Because of the Passlock Security System

Passlock is an immobilizer that was first used in several General Motors vehicles in the mid-to-late 1990s. In the definition of an immobilizer, it is “an electronic security device installed in a vehicle that prevents the engine from starting unless the right key (or token) is present.” Passlock, on the other hand, should be dubbed the “Great Immobilizer” since it not only prevents criminals from entering with no keys, but it also prevents owners from entering with the correct keys.

How do I know if my car has Passlock?∞

VATS, Passkey, and Passlock are just a few of the security systems that General Motors has adopted, but if your GM comes with a key that doesn’t have a chip in it, chances are it’s a passlock.

How is Passlock supposed to work?∞

Passlock makes use of a coded lock cylinder that, in essence, prevents the engine from starting until the appropriate key is identified by the system. When the key is put into the ignition, a magnet on the cylinder sends a signal to the ECM (engine control module) telling it that everything is in working order and that the vehicle may be started and operated.

What goes wrong with Passlock?∞

In order to prevent the engine from starting until the correct key is identified, Passlock makes use of a coded lock cylinder. A signal is generated when the key is put into the ignition cylinder, which is delivered to the ECM (engine control module) to indicate that everything is in working order and that the vehicle may be started and operated.

How to Fix Passlock for Chevy Vehicles∞

Leaving your key in the ignition in the “auxiliary” position for around 10-15 minutes until the security light turns off will provide a temporary solution to the problem. After the light has gone out, you can try to restart the engine once more. Rinse, repeat, and weep some more. It is possible to get a more permanent solution by replacing the ignition lock cylinder or bypassing the sensor. Replacement of a cylinder with new sensors might cost as much as $450 when labor is included. Bypassing the sensor will violate any warranty, but as the vast majority of these vehicles are out of warranty at this time, this may not be a major worry for the majority of people.

How to Reset the Passlock System on GM Cars

Image of a man driving a car taken by palm trees from Fotolia.com A broad range of General Motors vehicles are equipped with a passlock theft system, which is designed to prevent GM vehicles from being stolen. GM automobile owners, on the other hand, are not unusual in experiencing problems with their passlock system while attempting to start their vehicle. During this time, you will notice that the security (Theft Sys) light is flashing at random intervals and that you will not be able to start your car.

Step 1

To begin, insert your key into the starter and start your automobile as you normally would, then allow it to stall. Hold down the “On” key until you are finished. To put it another way, do not return the key to the “Off” position. When the key is in the “On” position, you will be able to use the air conditioning, listen to the radio, and see all of the lights on the dashboard, which will indicate that the key is in the “On” position.

Step 2

Wait until the “Theft Sys” light on your dashboard does not flicker and remains illuminated. It will take roughly 10 to 15 minutes to complete this task.

Once the “Theft Sys” light has been illuminated for a sustained period of time, the vehicle should be started immediately. Keep in mind not to switch off the ignition. Your vehicle will now restart and the passlock system will be reset as before. ReferencesTips

Wait until the “Theft Sys” light on your dashboard has been illuminated and is not blinking for at least five seconds. You may expect this to take between 10 and 15 minutes. As soon as the “Theft Sys” light continues to illuminate persistently, turn on the car. Don’t forget not to switch off the ignition! Once the passlock system has been reset, your vehicle will begin to operate as normal. ReferencesTips

Biographical Information Herman Cruz has been writing professionally since 2007. He is based in Orange County, California. It is also possible to find his pieces published on a variety of content platforms, and he has also written for Internet entrepreneurs that want aid with the creation of sales letters and articles for their companies. A Bachelor of Arts in integrated composition, improvisation, and technology is being pursued by Cruz, who is a student at the University of California, Irvine.

This article covers how to circumvent the “Passlock Security System” used on various different versions of General Motors vehicles. CAUTION: If you decide to make this alteration, be sure you read this whole article completely and follow the instructions to the letter. Do not skip any of the steps in the process. I’ll say it again. Make sure you don’t miss any steps.

The Problem

You attempt to start your General Motors automobile. The engine begins to run, but dies after one or two seconds, and the “SECURITY”light begins to blink intermittently. OR. You’re driving along when, for no apparent reason, the “SECURITY”light illuminates completely and remains illuminated. After you have shut down your vehicle, the SECURITY light will remain illuminated until you restart your vehicle. This is a prevalent problem on the following General Motors automobiles: Oldsmobile Alero from 1999 to 2004 Chevrolet Malibu from 1997 to 2003 Pontiac Grand Am from 1999 to 2004 The Security Module, which is a component of the Ignition Lock Module, is frequently the source of the problem.

“If the SECURITY light flashes or remains illuminated after attempting to start the engine, wait ten minutes with the key in the ON position until the light goes off.
Unfortunately, you will most likely have to go through the same process all over again a few of weeks later.
The instructions in the menu to the left will walk you through the process of bypassing the Passlock Security System on a 2003 Oldsmobile Alero and permanently turning off the “SECURITY” light.
There are only slight variances in the methods used to remove the radio from the vehicle in order to access the wiring.
They are color coded as follows: black (analog return), white (power), and yellow (analog data).
By removing the radio from the dashboard and reaching through a hole in the radio compartment toward the steering wheel, the three wires may be reached and accessible.

This article covers how to gain access to these wires and how to change the circuit in order to circumvent the security module located in the ignition switch. Tools and supplies are the next step.

Astro-Safari-Info – Passlock

Passlock — coded lock cylinder, according to Cardone ProTech. The Passlock anti-theft mechanism requires the presence of a key in the lock cylinder in order to be activated and function properly. The lock cylinder is comprised of a stationary Hall effect sensor and a spinning magnet that work in conjunction. Whenever a key is rotated in the lock cylinder, the magnet generates a signal on the Hall effect sensor, which is then detected. This is followed by transmission of an encoded signal to the instrument panel cluster (IPC) or body control module BCM via the cylinder.

If the IPC/BCM receives the expected coded signal, the IPC/BCM will start the vehicle.
The battery will be utilized for 30 minutes while the alternator is not accessible to charge the battery during this time.
Both the IPC/BCM and the PCM must be operational and in constant communication with one another.
Start the car by turning the key in the ignition.
3.
Ten minutes after the “SECURITY” indicator light comes on, it will switch off.
Turn the ignition switch to the “OFF” position and wait 10 seconds before continuing.

Make an attempt to start the engine and then release the key to the “ON” position to complete the process.

Keep an eye out for the “SECURITY” warning light.

Ten minutes after the “SECURITY” indicator light comes on, it will switch off.

Depress the “OFF” button on the ignition and wait 10 seconds before turning it back on.

Start the engine by pressing the start button.

Using a scan tool, clear any error codes that may have shown.

If the automobile does not start after one cycle, repeat the process until it does.

Passkey III – transponder ignition key, as written by Cardone ProTech.

When the ignition switch is turned on, the transponder is energized by the exciter located inside the ignition lock cylinder.

To determine whether or not the key signature supplied is acceptable by the theft deterrent control module, the theft deterrent control module will transfer the fuel enable password to the powertrain control module (PCM).

In order to execute a relearn on a Passkey III system, ensure that the vehicle’s battery is completely charged.

Connect a battery charger to the battery to guarantee that power is accessible for programming while the battery is being charged.

Keys for additional vehicles can be learned immediately after the first key has been learned by inserting the additional key and turning the ignition switch to the on position within 10 seconds of removing the previously learned key.1.

Insert a master key (with a white head) into the ignition switch.3.

2) Insert key into “ON” position without turning on the ignition.

The security light should be activated and remain on.

Wait 10 minutes, or until the security light shuts off, before proceeding.

Hold the “OFF” key in the “ON” position for five seconds.

Turn the key to the “ON” position without turning the engine on or starting it.

10.

A new start cycle will be required for the acquisition of critical transponder information.

Turn the ignition key to the on position.

It is necessary to re-learn any extra keys as follows:12.

13.

Within 10 seconds of removing the previously used key from the ignition, turn the key to the “ON” position.

Wait for the security light to go out before proceeding.

Because the value of the transponder will be learned instantly, you may not even see the bulb.

Cardone ProTech wrote:Before doing a relearn on a Passkey II system, make sure that the vehicle’s battery is completely charged, according to the manufacturer.

Connect a battery charger to the battery to guarantee that power is accessible for programming while the battery is being charged.

Don’t even bother trying to start the engine.

During the 11-minute time, the security light will remain on or will flash continuously.

For the next 30 seconds, turn the ignition switch to the “OFF” position.

Turn the ignition switch to the “OFF” position for 30 seconds a third time to complete the procedure.

8. Depress the “OFF” button on the ignition switch to turn it off. 9. Make an unsuccessful attempt to start the engine. The relearn process is complete if the engine starts and operates properly. An illustration of a late-model wiring diagram:

GM Security Relearn Procedure

Vehicle Thief Deterrent (VTD) systems are available in three different configurations on General Motors cars, each needing its own set of reconfiguration procedures. After the PCM has been changed, the car will not start unless the following steps are followed exactly as directed. The three systems are as follows: Vehicle Anti-Theft System (VATS), Passkey, Passkey II –resistive chip ignition key, Passkey III –resistive chip ignition key Passlock — a cylinder with a code. Passkey III is a transponder ignition key that works with a transponder.

Simply have a glance at the keys (see page 4).
Resistive chip ignition key (VATS, Passkey, Passkey II) Vehicle Anti-Theft System (VATS) – The Vehicle Anti-Theft System (VATS) is comprised of a separate module known as the Theft Deterrent Module (TDM), which checks the resistive chip in the ignition key for validity.
When replacing the PCM in a vehicle equipped with VATS, there is no need to retrain the driver.
If the resistance value detected by the TDM matches the value expected by the TDM, the TDM will send a signal to the PCM alerting the PCM that a valid key is present, and the PCM may proceed to start the car as a result of the signal.
Passkey II – The Theft Deterrent Module (TDM) function is housed in the Body Control Module of the Passkey II system (BCM).
Upon determining that the resistance reading by the BCM is consistent with what the BCM expects, the BCM will send a message through serial data to the PCM alerting the PCM that a valid key is present and that the PCM may begin the vehicle’s ignition.
The battery will be utilized for 30 minutes while the alternator is not accessible to charge the battery during this time.
Both the BCM and the PCM must be in operation and communicate with one another at all times.

Turn the ignition key to the “ON” position after inserting it. Don’t even bother trying to start the engine. Allow for approximately 11 minutes of operation with the key in the “ON” position. During the 11-minute time, the security light will remain on or will flash continuously. Please do not proceed to Step 2 until the security light has been turned off or has stopped flashing. For 30 seconds, turn the ignition switch to the “OFF” position. Activate the ignition switch by pressing the “ON” button as in Step 1 for 11. For 30 seconds, turn the ignition switch to the “OFF” position. Step 1: Turn the ignition switch to the “ON” position for 11 minutes for a third time, just like in Step 1. For a third time, turn the ignition switch to the “OFF” position for 30 seconds while driving. For 30 seconds, turn the ignition switch to the “ON” position. Set the ignition switch to the “OFF” position. Make an attempt to start the

The relearn process is complete if the engine starts and operates properly. Passlock — a cylinder with a unique code. The Passlock anti-theft mechanism requires the presence of a key in the lock cylinder in order to be activated and function properly. The lock cylinder is comprised of a stationary Hall effect sensor and a spinning magnet that work in conjunction. Whenever a key is rotated in the lock cylinder, the magnet generates a signal on the Hall effect sensor, which is then detected. This is followed by transmission of an encoded signal to the instrument panel cluster (IPC) or body control module BCM via the cylinder.

If the IPC/BCM receives the expected coded signal, the IPC/BCM will start the vehicle.

The battery will be utilized for 30 minutes while the alternator is not accessible to charge the battery during this time.

Connect a battery charger to the battery to guarantee that power is accessible for programming while the battery is being charged. Both the IPC/BCM and the PCM must be operational and in constant communication with one another.

Turn the ignition key to the “ON” position
Attempt to start the engine and then release the key to the “OFF” position
Keep an eye out for the “SECURITY” sign. It will turn off after 10 minutes if the “SECURITY” indicator light is not used. Wait 10 seconds after turning the ignition to the “OFF” position. The engine should be started by pressing the “ON” button and then letting go of the key. Keep an eye out for the “SECURITY” sign. It will turn off after 10 minutes if the “SECURITY” indicator light is not used. Wait 10 seconds after turning the ignition to the “OFF” position. The engine should be started by pressing the “ON” button and then letting go of the key. Keep an eye out for the “SECURITY” sign. It will turn off after 10 minutes if the “SECURITY” indicator light is not used. Wait 10 seconds after turning the ignition to the “OFF” position. The new password has been memorized by the vehicle. Begin with the
Remove any issues that have arisen using a scan program

NOTE: For the majority of automobiles, a single 10-minute cycle will be sufficient to train the vehicle on the new password. If the automobile does not start after one cycle, repeat the process until it does. The majority of vehicles will require all three rounds in order to discover the password. Passkey III is a transponder ignition key that works with the Passkey II. The Passkey III anti-theft technology works by embedding a transponder in the head of the ignition key’s key cylinder. When the ignition switch is turned on, the transponder is energized by the exciter located inside the ignition lock cylinder.

To determine whether or not the key signature supplied is acceptable by the theft deterrent control module, the theft deterrent control module will transfer the fuel enable password to the powertrain control module (PCM).
In order to execute a relearn on a Passkey III system, ensure that the vehicle’s battery is completely charged.
Connect a battery charger to the battery to guarantee that power is accessible for programming while the battery is being charged.
Keys for other vehicles can be learnt immediately after the first one has been taught by inserting the new key and flipping the ignition switch to the on position within 10 seconds of withdrawing the previously learned key from the vehicle.

Insert a master key (with a black head) into the ignition and turn it on. Turn the key to the “ON” position without turning the engine on or turning it off. The security light should be activated and remain on
Wait for 10 minutes, or until the security light goes on, before proceeding. For number 5, turn the key to the “OFF” position. Turn the key to the “ON” position without turning the engine on or turning it off. The security light should be activated and remain on
Wait for 10 minutes, or until the security light goes on, before proceeding. To turn the key to the “OFF” position, press it twice. During the following start, the critical transponder information will be learned
Begin by completing the Relearning is accomplished if the vehicle starts and operates normally after being stopped for a while. If there are any extra keys that need to be learned: Set the key to the “OFF” position
Insert the key that will be used next. Immediately after removing the previously used key from the ignition, turn the key to the “ON” position. Wait for the security light to illuminate. It should be completed rather shortly. It is possible that you will not see the lamp since the transponder value will be learned almost instantly

Steps 12 through 14 should be repeated for any additional keys. What system do you have and how can you tell – Take a look at the keyboard. Passkey and Passkey Pro are not featured, however they are extremely similar to VATS and Passkey Pro

Can’t Start the Engine Because of the Passlock System

Passlock is an immobilizer that was first used in several General Motors vehicles in the mid-to-late 1990s. In the definition of an immobilizer, it is “an electronic security device installed in a vehicle that prevents the engine from starting unless the right key (or token) is present.” Passlock, on the other hand, should be dubbed the “Great Immobilizer” since it not only prevents criminals from entering with no keys, but it also prevents owners from entering with the correct keys. Passlock makes use of a coded lock cylinder that, in essence, prevents the engine from starting until the appropriate key is identified by the system.

Passlock Light On Preventing Engine to Start∞

For the most part, this means that there is an issue with the sensor. Some have speculated that the pins in the system are “tin” coated and will oxidize as a result of exposure to air over time. Others claim that their system has been seized by the devil and requires the services of an exorcism. The decision on which one is more correct will be left to you. When the sensor malfunction first manifests itself, it is often represented by the system error code B2960. In this case, the “security” light will remain on, and the vehicle’s engine will either a) fail to start at all, or b) start for a brief period before shutting down.

A Temporary Fix∞

Bypassing the sensor will violate any warranty, but as the vast majority of these vehicles are out of warranty at this time, this may not be a major worry for the majority of people. The website NewRockies.com gives a way on how to completely defeat the PassLock mechanism in General Motors vehicles.

Security Light on Why?: So, I Bought This Truck and Changed the .

Greetings, and thank you for your time. It appears that the key has forgotten what it was given as a password. I’m going to presume you disconnected the battery cable. When the cable is disconnected, this is a regular occurrence. I’ve included the technique for relearning below. Roy Replace the PASSLOCK(TM) SENSOR, BCM, or PCM with a replacement program.IMPORTANT: Body control module (BCM) settings must be programmed into the body control module (BCM) before any learn processes can be performed.

Upon installation of a GM Service Parts Operations (SPO) replacement part in lieu of the BCM, the module will immediately recognize the PASSLOCK(TM) sensor data code.
If you replace a PCM with a replacement component from General Motors Service Parts Operations (SPO), these modules will learn the incoming fuel continue password instantly upon receipt of a password message from SPO after being programmed.
A PCM that has been previously installed in another vehicle will have learned the password for the other vehicle’s fuel continue feature and will require a learn process after programming to learn the password for the current vehicle’s fuel continue feature.
A 30 minute process that does not necessitate the use of any instruments is performed.
INSTRUCTIONSTECH 2TECHLINE terminal with the most recent Service Programming System (SPS) softwareTECH 2TECHLINE terminal with the most recent Service Programming System (SPS) software 1.
2.
On the techline terminal, pick “Theft Module Re-Learn” from the drop-down menu under “Service Programming.” 5.

Choose “VTD Re-Learn” from the drop-down menu under “Service Programming.” 8.

9: Keep an eye on the SECURITY telltale, which will turn OFF after about 10 minutes.

10.

11.

12.

Learn the procedure in 30 minutes.

Turn the key in the ignition while the engine is turned off.

Following the completion of three cycles/thirty minutes, the vehicle is ready to relearn the PASSLOCK(TM) Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK.

Before attempting to start the car, be sure that the ignition is turned off.

The PASSLOCK(TM) Sensor Data Code and/or password have been learnt by the vehicle at this point. 7. Using a scan tool, clear any DTCs that may have appeared. DTCs from the past will automatically clear after 100 ignition cycles. Friday, April 23rd, 2021 AT 12:10 p.m. SPONSORED LINKS (Merged)

Truck wont start. PassLock Security issues

I’ll try to keep this as quick as possible. 2003 Chevrolet Silverado 2500HD Crew Cab 8.1L I recently purchased a pickup (about a month ago). Until approximately two weeks ago, the truck was in perfect working order. When I attempted to start the truck, it would splutter and die. When I attempted it again, it would attempt to run and then die. (behaved as though it were about to run out of gas) Allowing the truck to sit overnight resulted in no problems the following day. (Because the scenario was unfamiliar to me, I did not pay attention to the security light.) I did find it weird that the plastic on the column was only half on, which led me to believe that the prior owner was having some type of trouble.

I was attempting to figure out why the passenger seat (which is motorized) was not working.
I was a complete moron.
When I went out to perform an errand a short time later, the vehicle was experiencing the same problem.
As a result, I now pay close attention to the security light.
The truck is still not starting.
I tried it, but it didn’t work.
The truck would only crank at this point.
It was almost as if it had run out of gas before.
NOTHING.
So I used a scan tool to look for P1631 and B2948, which I discovered.
As a result, I came here in search of advice and assistance.

Random PassLock illumination

Try the relearn technique to see if it helps. Start by turning the ignition key to the “On” position and inserting it into the ignition keyhole (Do not start the engine). Continue to leave the switch turned on for 11 minutes. During this 11-minute time, the security light may flash or remain illuminated continuously. Check to see that the light is no longer on or flashing before moving on to step 2. 2. Depress the ignition switch for 30 seconds to turn it off. 3. Turn the ignition switch to the “On” position (as in step 1) for another 11 minutes while keeping the engine running.

Remove the key from the ignition switch for another 30 seconds.

For the third time, turn the ignition switch to the “On” position and wait 11 minutes.

Turn the ignition switch off for a final 30 seconds to complete the process.

Turn the ignition switch to the “On” position one final time and wait for 30 seconds before starting the vehicle.

Make an unsuccessful attempt to start the engine.

Before starting the relearn operation again, check for and resolve any issue codes that may have been set by the engine.

When used with Passlock I and Passlock II systems, the sensor is a component of the ignition lock cylinder.

I created a thread for the “starting relay” problem:TSB 09-06-03-0042005-09 All of the Vehicles Repairing fretting corrosion once it has been diagnosed Follow these steps: Disconnect the affected connection and lubricate it.

This should not be done: do not swap modules without replicating the condition. 09-06-03-004 Check the lubrication of the BCMPCM connections. GL